Zee art gallery sells pictures for 50. Zee pays $20 for the print and frame, and pays the sales clerk 10% as a commission. Zee has $7,000 of monthly fixed cost as well. She has $5,000 of monthly fixed costs as well. How many sales dollars in pictures does Anita need to sell to break even?

a. 480

b. 2,400

c. 24,000

d. 400